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Transcription and Regulation

Transcription and Regulation
Transcription factors are

proteins which bind to DNA and regulate transcription
promoters
CATT boxes
TATA boxes

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Transcription and Regulation
The RNA polymerases that transcribe bacterial DNA are

multisubunit enzymes
interchangable with DNA polymerases
highly glycosylated in their active forms
only active inside the cell

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Transcription and Regulation
Transcription begins

upstream from the start codon
downstream from the start codon
at the start codon
none of these

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Transcription and Regulation
Promoters for tRNAs are located

upstream from the start codon
both (a) and (b)
downstream from the start codon
none of these

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Transcription and Regulation
The complex of RNA polymerase, DNA template and new RNA transcript is called

none of these
a translation bubble
replication bubble
transcription bubble

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Transcription and Regulation
The closed complex at bacterial promoters is

not affected by promoter mutations
in equilibrium with free RNA polymerase and the promoter
bound more tightly when repressors are present
not affected by activator proteins

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